Artificial tooth.



J. W. VGRL ARTIFIGL TOUTE. APPLICATION FILED Nov.

El auf 0259i tu use:

plate n therewith. i 'thor utlvzmteises are )reu s l ucd, will oehereinafter tlescrlbe..

For purpose explaining the invert tion, tire accompanying drawingillustrates o. satisfactory reduction of tile same to prix@ tice.` tout.the important. instruuieotulities lili re l" varied, und so it is to beit, toe invention is not limited` it ger 'mt :mtl orguxiiyiutirm frepresent. per- .etii embodying 1 A oui t n the teeth respeetiw f "t, i0und 13. eut central sections eugeetively illustrated in l i@ und 17represent is). iev/s ofotlieif modifications.

in the Y sire' to tire drawings- A, Figs. It, mui ucf-iiyfgmitcs thebody of an artiiciul too'l". Eirzieucling from the buse ot" said. Vbodyis the projection i3, which` is ot less width than Suid body, thusforming the shoulder C, said. shoulder forming on angle with buse of theouter rim of the body' portion. The forward portion of the progection Bis cui; away, forming' the channel D, which is adjacent to the innerWull E of the 'fuse of the tooth. Cn the muse of the prc-iectiou l tirecliumlel F, which ou loods at :in wiggle to the channel D, said baiseliar' 5" tlieremalso the ycavity Gr, one of more, which is interposedbetween the climi l! :and if, in the Wall E ore recesses H, boing; seenthat the projection B, shoulder C, channels D, i?, cuvity nel recesses sineens the i Spsccetou Letters Patent..

Montoit er il?.

Serai No. 4613:,591.

'base oit the too-til, thus attordingg aclditonol plate materialStrength between adjacent teeth and have the surfaces of the lutterapfpeor io rmturul torio extcriorly. Further-- more, the curity GAextends cieeply into the body of the tooth :mol has its siole wallumlorcutto form a clovetail joint with the piste, the line ot' theco'vity being deeper l'linrx ilu-.t o: the shoulder of the projection bywhich provision the front or other portion of s-.iid projection may beground, clown to t :i cust `or shortened to tit a model, While the toothvmay be reaciiiy aiictiorecl in the plate material. Y

Figs. 4, 5 und 6 substantially' present the same characteristics astlioso in the previous figures, excepting that in the latter, .theshoulder J2 is rounded, it is rectanguior. ,V .Y f

'in Figs. 7, S und. 9, the projection shown liefir'fsmpco. uml theshoukler C3 around. the sume is of the hotly lms :i coiumxiuigicutiiigwith the climinel F in the 'tace of the projection B.

in Figs. l0, l1 and 1Q, the projection.314v has sloping sides, formingthe sloping shoulder G4, the tace having tlierein the cavity G. and thechannel the lutter communicating 'with the recess J inthe 'rear Woll Eof the body of the tooth.

lo Figs. 13, i4 sind 15, the body luis a, somewhat peurjsha-pedprojection B. und. the

shoulder conforms to the contour heieo..

The face of seid projection has also in it, the charmel F and the cavityG, and iii its mur giu, the notch K, said channel F being incommunication with the recess J. The resuits in the constructions shownin these Figs. 4; to l5 inclusive are substantially the seme as thoseshown in Figs. 1, 2 and 3.

in Figs. 16 and 17, the cavities G2 of increased diameters to formlarger engagements for the material of the plat-s, anti the inner sidesof the walls of said cavities are also undercut as in the other guies,to pro- Vide looking surfaces with the materie o the plante of the orderof dove-tails, 'whereby the teeth are held. with 'greater rip in thepiste, und so rendered immovagle and detuclmii' a under ordinary'circumstances.

Itri it), il sind 12, .'t show the cuyity t? :mol rec es J2 joined bythe clioeuei i whereby said cayity euri recess cally in communicatiom Onthe sides of the latere-tivoli oit the bitimiluily shaped, Elie rear wmlrecess J therein, tlie sume are geraet While in tl'e former! loo ing orgrinding body of the tooth are the acute-angular depressions Cf, whichare formed by cutting away the inner lateral Walls of the face of anincisor or cnspid or molar to a point beneath the outer lateral cuttingedge of an incisor or cuspid, or the front lateral cusps of a molar orbicuspid, having for its inner wall the converging base of the outer rimof the palatal or grinding portion of the body of the tooth, andhaving'on its inner wall the shoulder C. The outer base of suchdepression is of less depth on a molar or bicnspid than on an incisor orcuspid ordepcndcnt on the width or depth of the crown, said depressionassisting to overcome the outward strain in masticat-ion, the platematerialbeing moulded into said depression.

"n'Atten'tion is directed to the fact that the 'shoulder C extends fromthe innerwall E I claim as new and desire to secure by Letters Patent,1s

1. An artificial tooth having on the base of the bitin or grinding bodythereof aprojection of less Width than the body of the tooth andextending in the longitudinal direction therefrom an d a shoulderforming an y angle With the outer rim of said base.

2. An artificial tooth having on thc base of the biting or grinding bodythereof a projection of less Width than the body of the tooth andextending in the longitudinal direction thereof and forming a shoulder'with said base, said projection having channels in the basethereof,'the same extending at an angle to each other.

3. An artificial tooth having on the ba'se of the palatal biting vorgrinding body thereof a projection extending in the longitudinaldirection therefrom and forming a shoulder with the outer rim of saidbase, said projection having a channel and a cavity in the face thereofextending into the body of the tooth.

et. An artificial tooth having on the base of the palatalbiting orgrinding body thereof a projection extending in the longitudinaldirection therefrom and forn'iing a shoulder with the outer rim of saidbase, said projection haring ay channel in the base thereof, and therear Wall of said body having therein a recess.

5. An artificial tooth haring on the base of the palatal biting orgrinding body thereof a projection extending in the longitudinaldirection therefrom and forming a shoulder with the outer rim of Saidbase, thcmargin of said projection -haring ay depression therein.

6. An artificial tooth having on the base of the palatal biting orgrinding body thereof a projection of less width than the body of thetooth and extending in the longitudinal direction therefrom and forminga shoulder with the outer rim of said base, said projection having achannel and a cavity in the base of said projection, the inner Wall ofthe same being undercut.

7. An artificial tooth formed With a projection with channel and havingon a side of thc lateral wall of the biting or grinding body thereof anacute-angular depression.

JAMES XV. IVORY.

Witnesses JOHN A. Winnnnsnnnu, HARRY C. DaL'roN.

